N-th order curve fit for power calibration in a mobile terminal
US7529523B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2005 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Sep 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for calibrating the output power of a mobile terminal using at least a second order curve fit to describe a power amplifier gain (PAG) setting versus output power characteristic of a power amplifier in a transmitter of the mobile terminal is provided. For each of an upper-band frequency, a mid-band frequency, and a lower-band frequency of a frequency band, multiple measurements of the output power of the mobile terminal are made corresponding to multiple values of the PAG setting, and a curve fit is performed, thereby calculating coefficients defining a polynomial describing the PAG setting versus output power characteristic. Using the polynomials describing the PAG setting versus output power characteristic of the power amplifier for each of the upper-band, mid-band, and lower-band frequencies, values of the PAG setting are determined for each desired output power level for each desired frequency within the frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.